increase factorial execution speed

1 view (last 30 days)
Hello there
I'm attempting to use the prod function to construct the factorial code more quickly, but I'm encountering a problem.
Please let me know the reason for this and what I might be doing incorrectly.
Many thanks
n = fi(1); % n max is 20
n =
1 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 14
indx = max(1,max(min(n,20)));
for g = 1:indx
out(:) = prod(1:indx,'all');
end
Error using prod
Invalid data type. First argument must be numeric or logical.

Accepted Answer

Chunru
Chunru on 2 Sep 2022
Edited: Chunru on 2 Sep 2022
n = 5 % n max is 20
n = 5
out = cumprod(1:n)
out = 1×5
1 2 6 24 120
n = fi(5); % n max is 20
out = (1:n);
for i = 2:n
out(i) = out(i-1)*i;
end
out
out =
1 2 6 24 120 DataTypeMode: Fixed-point: binary point scaling Signedness: Signed WordLength: 16 FractionLength: 0
  6 Comments

Sign in to comment.

More Answers (0)

Categories

Find more on Graphics Performance in Help Center and File Exchange

Tags

Products


Release

R2022a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by